This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $525 fare is the cheapest current round-trip from Las Vegas (LAS) to STL on Frontier flight F93108, departing 2026-07-17 at 12:50 with return on 2026-07-23.

Clicking "Book this flight" opens Kiwi.com with this exact flight pre-filtered — same airline, same dates, same passenger count.